Not quite ready to leave wandering the briny depths up to robots, but still crave some undersea tech? The freshly released iGills Smart Diving System can help. With a polycarbonate housing and free companion app, the setup turns your iPhone into a fully featured recreational dive computer and logbook that can plunge up to 130 feet into the drink. Once connected to the waterproof case's 30-pin dock, handsets gain access to depth and temperature sensors in addition to six buttons for in-app navigation. Not only does the software provide vital dive information, it also allows users to take stills and videos of their underwater excursions through a glass camera port. If you're pining for an iOS-assisted diving experience, the iPhone 3GS, 4 and 4S-compatible rig will set you back $330. Check out a quick clip of the accessory, complete with requisite rock music, after the break.